Patents by Inventor Swaraj Paul

Swaraj Paul has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10947379
    Abstract: The present disclosure relates to a halogen-free flame retardant additive for polymers, such as polyolefins, comprising (i) a phosphorous-nitrogen-containing component containing amine and/or ammonium groups; and (ii) a (meth)acrylic acid homo- or co-polymer selected from the group consisting of a partially or fully neutralized salt of poly((meth)acrylic acid), a partially or fully neutralized salt of a partially crosslinked poly((meth)acrylic acid), a partially or fully neutralized salt of a copolymer of an olefin and (meth)acrylic acid comprising at least 50% by weight of (meth)acrylic acid repeating units, and any combinations of the foregoing polymers. The present disclosure also relates to a flame retardant polymer composition comprising the flame retardant additive and a method of reducing the flammability of a polymer, in particular a polyolefin, using the flame retardant additive.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: March 16, 2021
    Assignee: PP POLYMER AB
    Inventor: Swaraj Paul
  • Publication number: 20190127568
    Abstract: The present disclosure relates to a halogen-free flame retardant additive for polymers, such as polyolefins, comprising (i) a phosphorous-nitrogen-containing component containing amine and/or ammonium groups; and (ii) a (meth)acrylic acid homo- or co-polymer selected from the group consisting of a partially or fully neutralized salt of poly((meth)acrylic acid), a partially or fully neutralized salt of a partially crosslinked poly((meth)acrylic acid), a partially or fully neutralized salt of a copolymer of an olefin and (meth)acrylic acid comprising at least 50% by weight of (meth)acrylic acid repeating units, and any combinations of the foregoing polymers. The present disclosure also relates to a flame retardant polymer composition comprising the flame retardant additive and a method of reducing the flammability of a polymer, in particular a polyolefin, using the flame retardant additive.
    Type: Application
    Filed: December 21, 2018
    Publication date: May 2, 2019
    Inventor: Swaraj PAUL
  • Patent number: 8975320
    Abstract: A flame retardant additive for polymers is disclosed which additive comprises a polyacrylate in combination with a) at least one zinc borate, b) at least one silicone resin, and c) alumina trihydrate or magnesium hydroxide or a mixture thereof, said additive being free of halogens, antimony oxide and phosphorus-containing substances. A flame retardant composition comprising a polymer and a flame retardant additive is also disclosed as well as a method of reducing the flammability of a polymer by mixing said polymer with said flame retardant additive.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: March 10, 2015
    Assignee: PP Polymer AB
    Inventor: Swaraj Paul
  • Publication number: 20100004370
    Abstract: A flame retardant additive for polymers is disclosed which additive comprises a polyacrylate in combination with a) at least one zinc borate, b) at least one silicone resin, and c) alumina trihydrate or magnesium hydroxide or a mixture thereof, said additive being free of halogens, antimony oxide and phosphorus-containing substances. A flame retardant composition comprising a polymer and a flame retardant additive is also disclosed as well as a method of reducing the flammability of a polymer by mixing said polymer with said flame retardant additive.
    Type: Application
    Filed: October 25, 2006
    Publication date: January 7, 2010
    Applicant: PP POLYMER AB
    Inventor: Swaraj Paul
  • Patent number: 6190446
    Abstract: A glue for splicing photographic films that comprises: 0.5 to 4% nitrocellulose, 5 to 25% of alkanol, 5 to 20% lower alkyl acetate, 20 to 80% ketone, and 4 to 15% alkoxyalcohol.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: February 20, 2001
    Assignee: Eastman Kodak Company
    Inventors: Swaraj Paul, Ann-Christin Paul
  • Patent number: 5280084
    Abstract: Polymer material is surface modified with the intention of increasing the hydrophilicity of the polymer surface, by producing carboxyl groups, carbonyl groups and hydroxyl groups on the polymer surface in a first stage, by oxidizing with, e.g., oxidizing acid solutions or in some other manner, and by reacting the groups on the polymer surface in a second step with heterocyclic compounds having three or four ring atoms or with isocyanate compounds or carbodiimide compounds.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: January 18, 1994
    Assignee: PP Polymer AB
    Inventor: Swaraj Paul
  • Patent number: 4243772
    Abstract: A two step process for the preparation of polymers which contain an easily controllable amount of sulfonate groups. In the first step, a copolymerization or a graft copolymerization is carried out using a controlled amount of an epoxy group containing monomer, said monomer being an ester of 2,3-epoxy propyl alcohol and acrylic acid. In a second step, the epoxy groups of the polymer prepared in the first step are, via ring opening reaction, partially or fully sulfonated by means of sulfite ions in aqueous solution in the presence of a quaternary ammonium salt as a catalyst.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: January 6, 1981
    Inventors: Swaraj Paul, Bengt Ranby